CN217788040U

CN217788040U - Explosion-proof antimagnetic fireproof cable for flexible machine room power supply

Info

Publication number: CN217788040U
Application number: CN202221879462.1U
Authority: CN
Inventors: 田传国; 房勇; 张英
Original assignee: JIANGSU YUANFANG CABLE FACTORY CO Ltd
Current assignee: JIANGSU YUANFANG CABLE FACTORY CO Ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-11-11
Anticipated expiration: 2032-07-21

Abstract

The utility model provides an explosion-proof antimagnetic fireproof cable for a flexible machine room power supply, which comprises a cable core, wherein the cable core is formed by stranding a plurality of mineral insulation wire cores; a fireproof mineral flame-retardant rope is filled in a gap of the cable core, a halogen-free fire-insulating tape is wound outside the cable core, a metal composite shielding tape is wound outside the halogen-free fire-insulating tape, and a plurality of drainage wires are arranged in the metal composite shielding tape; the metal composite shielding belt is wrapped with a metal wire braided shielding layer to form a double-layer shielding; the metal wire braided shielding layer is wrapped with a mineral composite fireproof layer; the outer of the mineral composite fireproof layer is extruded with a plum blossom ribbed sleeve, and an interlocking metal armor layer is arranged outside the plum blossom ribbed sleeve; the interlocking metal armor layer is externally extruded with a halogen-free low-smoke flame-retardant ceramic polyolefin outer sheath; the current-guiding grounding wire is particularly suitable for three-phase four-wire and three-phase five-wire circuits with symmetrical loads and circuits with asymmetrical phase zero loads which need anti-interference grounding and signal signals, and the current-guiding grounding wire is used for ensuring the communication of a metal composite belt and is used as a feeder of high-precision electronic equipment and a power line of low-current equipment.

Description

Explosion-proof antimagnetic fireproof cable for flexible machine room power supply

Technical Field

The utility model relates to a wire and cable field specifically is an explosion-proof diamagnetic fireproof cable is used to flexible computer lab power.

Background

The cable technology for the power supply of the machine room belongs to a communication power supply and key infrastructure, and is complete and irreplaceable on a communication system. With the rapid development and the gradual excitation of competition of communication technology, the development of services and the quality of the whole network become the key points of attention of operators, meanwhile, the structure of the communication network is increasingly complex, and the development of information technology also puts higher requirements on the power technology, such as energy conservation, electricity conservation, material conservation, environmental protection, reliability, safety and the like, so that people are forced to research and develop more and continuously in the aspects of high efficiency, energy conservation, safety, environmental protection, green energy and the like, and the power line in the network energy system is used as the heart, guarantee and support system of the whole network to determine the stable operation and the service quality of the network, and the importance of the power line is self-evident. Therefore, the reliability and high availability of the power line of the network energy system become the basis for the steady development of the communication industry.

At present, the progress of information technology, especially the updating and updating of power devices, the continuous use of novel electromagnetic materials, the continuous improvement of power conversion technology, the continuous progress of control methods and the continuous fusion of technologies of related subjects make great progress in the aspects of system reliability, stability, electromagnetic compatibility, magnetic resistance, explosion resistance, electric energy utilization rate improvement, loss reduction, system dynamic performance improvement and the like of communication power supplies. But the most important power cord for the central nervous system machine room in the communication power system still steps in place, and meanwhile, the operation of the power cord in the machine room brings many defects: 1) The cable has poor anti-interference performance, and when the current transmitted by the cable contains higher harmonic components, the cable can generate electromagnetic interference on electronic equipment around the cable; on the contrary, the external electromagnetic interference can be coupled to the core wire of the cable, and the electromagnetic interference is generated on various electric appliances connected with the cable; 2) Various electrical components in a machine room are connected to form a base station of a relatively stable communication network, but tiny current-leakage current can be generated between a charged part and a grounding part which are mutually insulated in electricity through surrounding media or insulating surfaces of the charged part and the grounding part, so that the phenomena of personal electric shock, electric equipment burning loss, electric short circuit accidents and fire disasters are easily caused; 3) The power line laid in the traditional machine room building is difficult to avoid the damage or the breakdown of an insulated wire core caused by overvoltage generated under the electromagnetic effect of strong lightning current because of no shielding layer, and can also cause fire if the power line is serious; 4) The product of using in the computer lab is mostly high-accuracy sharp equipment.

SUMMERY OF THE UTILITY MODEL

The utility model provides an explosion-proof and antimagnetic fireproof cable for flexible machine room power supply, which combines double-shielding structure with leakage line structure to be used as grounding line and electromagnetic interference shielding inside or outside the cable; in addition, the product is structurally provided with a product fire-resistant, heat-dissipation and explosion-proof structure so as to ensure the safety and stability of the cable in the laying and using process, greatly improve the reliability of signals and power lines in use and ensure the safety of people and equipment.

The utility model discloses an explosion-proof antimagnetic fireproof cable for flexible machine room power, which comprises a cable core, wherein the cable core is formed by stranding a plurality of mineral insulation wire cores; filling a fireproof mineral flame-retardant rope in a gap of the cable core, wrapping a halogen-free fire-insulating tape outside the cable core, wrapping a metal composite shielding tape outside the halogen-free fire-insulating tape, and arranging a plurality of drainage wires in the metal composite shielding tape; wrapping a metal wire braided shielding layer outside the metal composite shielding belt to form a double-layer shielding; wrapping a mineral composite fireproof layer outside the metal wire braided shielding layer; a plum blossom rib-divided sleeve is extruded outside the mineral composite fireproof layer, and an interlocking metal armor layer is arranged outside the plum blossom rib-divided sleeve; a halogen-free low-smoke flame-retardant ceramic polyolefin outer sheath is extruded outside the interlocking metal armor layer; the quincuncial rib-separating type sleeve and the interlocking metal armor layer have multiple sections of gaps, so that the power line can play a certain heat dissipation function in the long-time operation process and effectively improve the current carrying capacity of the power line.

The mineral insulated wire core is further improved, and consists of a soft conductor, a mineral composite wrapping tape wrapped outside the soft conductor and a polyolefin insulating layer extruded outside the mineral composite wrapping tape.

In a further improvement, the soft conductor is formed by twisting a plurality of 5 th or 6 th annealed soft copper wires.

Further improved, the metal composite shielding belt is a copper-plastic composite belt or an aluminum-plastic composite belt.

The further improvement is that the mineral composite fireproof layer is composed of a ceramic fireproof and fireproof composite belt; the composite tape is formed by rolling and compounding ceramic fireproof and fire-resistant silicon rubber, a fire-resistant high-temperature glass fiber tape and mica powder, and has certain elasticity, self-adhesion and good sealing property; the mechanical property is excellent, and the electrical insulation property is excellent; the flame retardant does not fall off after combustion, has high fire resistance temperature and can pass CWZ (fire resistance, water spraying and vibration) tests of British fire-resistant cable standard BS 6387; thereby ensuring the fireproof, fire-resistant and insulating properties, aging resistance and impact resistance of the cable and stabilizing the product quality.

The metal wire braided shielding layer is formed by braiding tinned copper wires, and the braiding density is not less than 85%.

The quincunx ribbed sleeve is further improved and is formed by extruding polyolefin plastics through a quincunx ribbed die.

The interlocking metal armor layer is formed by interlocking and armoring aluminum alloy belts, 5000 series aluminum alloy (non-magnetic material) is adopted in the structure, and the interlocking metal armor layer is high in strength, strong in corrosion resistance, excellent in explosion-proof performance and good in bending performance.

Further improve, two liang the contained angle that forms between the drainage wire is 60, the drainage wire body also can directly hang the earth connection at the power snap switch in-process and change the power, this just can carry out work in the maintenance region under the condition of not stopping the circuit, brings the convenience for work, raises the efficiency, also safer.

The utility model has the advantages that:

the grounding or shielding effect of cable equipment is met by twisting a plurality of stranded annealed soft copper wires and adopting a structure of a double shielding layer and a leakage wire of a metal composite belt and a metal wire braided shield; meanwhile, the flame-retardant and fireproof structure of the product is added, so that the fireproof, fire-resistant and insulating properties, aging resistance and impact resistance of the cable are ensured, the product quality is stable, and the use safety performance is reliable; therefore, the three-phase four-wire and three-phase five-wire grounding device is particularly suitable for three-phase four-wire and three-phase five-wire circuits with symmetrical loads and circuits which need anti-interference grounding and have asymmetrical phase zero load due to signal, and meanwhile, the drainage grounding wire is used for ensuring the communication of the aluminum-plastic belt and can also be used as a feeder line of high-precision electronic equipment; in addition, the product is structurally provided with a certain gap between the plum blossom-shaped rib-separating sleeve structure and the interlocking metal strip armored metal sleeve, has a certain heat dissipation function, prolongs the service life of the product, and is also provided with a flame-retardant and fireproof structure so as to ensure the safety performance and stability of the cable in the laying and using process.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1, the utility model relates to an explosion-proof antimagnetic fireproof cable is used to flexible computer lab power, including mineral insulation sinle silk, mineral insulation sinle silk is by flexible conductor 1, around the package mineral compound outside flexible conductor 1 around band 2 and crowded package at the mineral compound outside the band polyolefin insulating layer 3 constitution.

It should be noted here that the soft conductor 1 may be formed by twisting a plurality of 5 th or 6 th annealed soft copper wires, or may be formed by twisting and complex twisting a plurality of 5 th or 6 th annealed soft copper wires.

A plurality of mineral insulated wire cores which are symmetrical to each other are twisted into a cable core, a fireproof mineral flame-retardant rope 4 is filled in the gap of the cable core, a halogen-free fire-insulating belt 5 is wound and covered outside the cable core, a metal composite shielding belt 6 is wound and covered outside the halogen-free fire-insulating belt 5, and a plurality of drainage wires 12 are arranged in the metal composite shielding belt; a metal wire braided shielding layer 7 is wrapped outside the metal composite shielding belt 6 to form a double-layer shielding;

it should be noted here that the metal composite shielding tape 6 is a copper-plastic composite tape or an aluminum-plastic composite tape, the metal wire braided shielding layer is braided by using tinned copper wires, the braiding density is not less than 85%, a double-layer shielding is formed, and then the drainage wire 12 is combined to mainly shield the electromagnetism, so that the inside is not interfered by the outside electromagnetism, the inside electromagnetic energy cannot easily run to the outside, and the mutual interference is avoided; the drainage wire can play certain ground protection effect, if take place the damage in the cable conductor, the electric current that leaks out can be in the same direction as shielding layer laminar flow income ground net, plays safety protection's effect.

Two liang the contained angle that forms between the drainage wire be 60, the drainage wire body also can directly hang the earth connection at the power snap switch in-process and change the power, this just can carry out work in the maintenance region under the condition of not stopping the circuit, bring the convenience for work, raise the efficiency, also safer.

The metal wire braided shielding layer 7 is wrapped with a mineral composite fireproof layer 8; a plum blossom rib-divided sleeve 9 is extruded outside the mineral composite fireproof layer 8, and an interlocking metal armor layer 10 is arranged outside the plum blossom rib-divided sleeve 9; a halogen-free low-smoke flame-retardant ceramic polyolefin outer sheath 11 is extruded outside the interlocking metal armor layer 10; plum blossom divides and forms multistage space 13 between muscle type sleeve pipe 9 and the interlocking metal armor 10, have certain heat dissipation function, improve the life of product simultaneously the product still set up fire-retardant, fire resistive construction in order to ensure cable safety performance and stability laying the use.

The utility model discloses a patent product has that the compliance is good, high temperature resistant, fire prevention, explosion-proof, and fire-resistant, fire-resistant adding waterproof, fire-resistant impact property all accords with BS6387 or BS8491 standard in addition, satisfies GB 31247 standard burning grade B simultaneously ₁ Rank and additional rank compliance d ₀ 、t ₀ 、a ₁ The requirements are stipulated, and a solid foundation can be laid for determining the stable operation and service quality of the network for the heart, the energy conservation, the electricity saving, the material saving, the environmental protection, the reliability, the safety and the like of the whole network and the guarantee and support system.

The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.

Claims

1. The utility model provides a flexible computer lab power is with explosion-proof antimagnetic fireproof cable which characterized in that: the cable comprises a cable core, wherein the cable core is formed by stranding a plurality of mineral insulated wire cores; the cable is characterized in that a fireproof mineral flame-retardant rope (4) is filled in a gap of a cable core, a halogen-free fire-insulating belt (5) is wound and covered outside the cable core, a metal composite shielding belt (6) is wound and covered outside the halogen-free fire-insulating belt (5), and a plurality of drainage wires (12) are arranged in the metal composite shielding belt; a metal wire braided shielding layer (7) is wrapped outside the metal composite shielding belt (6) to form double-layer shielding; a mineral composite fireproof layer (8) is wound outside the metal wire braided shielding layer (7); a plum blossom rib-divided sleeve (9) is extruded outside the mineral composite fireproof layer (8), and an interlocking metal armor layer (10) is arranged outside the plum blossom rib-divided sleeve (9); a B1-grade halogen-free low-smoke flame-retardant ceramic polyolefin outer sheath (11) is extruded outside the interlocking metal armor layer (10); a gap (13) is formed between the quincuncial rib-dividing casing (9) and the interlocking metal armor layer (10).

2. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply as claimed in claim 1, wherein: the mineral insulation wire core is composed of a soft conductor (1), a mineral composite wrapping tape (2) wrapped outside the soft conductor and a polyolefin insulation layer (3) extruded outside the mineral composite wrapping tape.

3. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply as claimed in claim 2, wherein: the soft conductor (1) is formed by twisting a plurality of 5 th or 6 th annealed soft copper wire bundles.

4. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply as claimed in claim 1, wherein: the metal composite shielding belt (6) is a copper-plastic composite belt or an aluminum-plastic composite belt.

5. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply according to claim 1, characterized in that: the mineral composite fireproof layer (8) is composed of a ceramic fireproof and fireproof composite belt.

6. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply as claimed in claim 1, wherein: the metal wire braided shielding layer (7) is formed by braiding tinned copper wires, and the braiding density is not less than 85%.

7. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply as claimed in claim 1, wherein: the plum blossom rib-separating type sleeve (9) is formed by polyolefin plastics through extrusion molding of a plum blossom rib-separating type die.

8. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply according to claim 1, characterized in that: the interlocking metal armor layer (10) is formed by interlocking and armoring aluminum alloy belts.

9. The explosion-proof diamagnetic fireproof cable for the flexible machine room power supply as claimed in claim 1, wherein: the included angle formed between every two drainage wires (12) is 60 degrees.